Witness accounts from a shootout in Watertown, Mass., in which a federal law-enforcement official said that a Boston Marathon bombing suspect was killed. Video courtesy: Associated Press

This transcript has been automatically generated and may not be 100% accurate.

I ... I ... I actually heard a lot more the oneness of EA's those over on the lawn ... which is a street ... parallel to this ... end you could hear what's only as good as sentiment he was issued out slash chase ... the dogs are coming from this direction ... towards Watertown from intrusion by IMF only heard two explosions that someone pops goes to that were smaller solid tops and one that ... was a lot of CDs and our car is ... Barclays tourists I ... I went down there ... to pull over ... the new like ten cars over a guy with one of the St ... and most of course turnaround of like ... for me to ... see what's happening ... we ... are serious ... this Lebanese legal battle ... I heard a loud boom ... and then of rapid succession ... it sounded like automatic weapons ... and in her second explosion ... then there was this smell something burning ... in the year ... we're still going to where they can in residence from the windows the show if he gets on my